I would like to know about how to connect to wifi using desmume too, since the developers said they blocked the wifi function in desmume to prevent noobs from messing around the wifi and getting desmume banned by nintendo from ever connecting to wifi.

Quoted from someonewhodied:

use desmume for wifi. no$ can't connect.

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Since you said desmume can connect to wifi, could you post a video showing it works with all the steps in detail?